Biology 3484A/B Lecture Notes - Lecture 1: Endemism, Inflorescence, Human Overpopulation

• School: Western University
• Department: Biology
• Course: Biology 3484A/B
• Professor: Nina Zitani

Document Summary

Info about species: presence of exoskeleton, molecular sequence data (ssu rrna) Exoskeleton: 2 body regions + 2 pairs of antennae, 4 pairs of legs, 2 body regions (cephalothorax + abdomen connected by pedicel) Extra-oral digestion-arachnids: partial digestion: of prey happens outside the body/mouth of arachnid, complete digestion: of prey happens, legs and pals attached to outside body of arachnid cephalothorax. Antenniform legs 2nd: function and look like antennae (chemo+mechano reception) 1 million: 3 body regions (head, thorax, abdomen, 3 pairs of legs + 1 pair antennae (attached to thorax) Pterygota- winged insects: specialized mouthparts, 2 pairs of wings (attached to thorax) 5,000: modified exoskeleton at base of wings (can fold wings over abdomen, specialized thorasis muscles, complete metamorphosis, presence of larva & pupal stages, larvae have internal wing development, presence of labial silk glands in larvae. Thorax: locomotion, large muscles for legs and wings,